/Engine/Plugins/Runtime/AR/AppleAR/AppleARKitFaceSupport/Source/AppleARKitFaceSupport/Public/AppleARKitFaceMeshComponent.h
Returns the value of the specified blend shape
the current amount the blend shape should be applied
[UFUNCTION](Programming/UnrealArchitecture/Reference/Functions)(BlueprintPure, Category="Components|ARFaceMesh") float GetFaceBlendShapeAmount ( EARFaceBlendShape BlendShape ) const